The refs hash is used to determine what branches and tags have a commit
as head in the network graph. The previous implementation depended on
Rugged#references. The problem with this implementation was that it
depended on rugged, but also that it iterated over all references and
thus loading more data than needed if for example the project uses CI/CD
environments, Pipelines, or Merge Requests.

Given only refs are checked the network cares about the GraphHelper#refs
method has no need to reject those, simplifying the method.

Closes gitlab-org/gitaly#880

Merge branch '42693-add-a-link-to-documentation-on-how-to-get-external-ip-in-the-kubernetes-cluster-details-page' into 'master'

Resolve "Add a link to documentation on how to get external ip in the Kubernetes cluster details page"

Closes #42693

See merge request gitlab-org/gitlab-ce!16937

Resolve "Add a link to documentation on how to get external ip in the Kubernetes cluster details page"

CE: Trace as artifacts (FileStorage only)

Closes gitlab-ee#4180

See merge request gitlab-org/gitlab-ce!16702

Override group sidebar links

See merge request gitlab-org/gitlab-ce!16942

Resolve "features/project/commits/commits.feature is failing on master"

Closes #42798

See merge request gitlab-org/gitlab-ce!16940

Resolve "Group label list page redesign"

Closes #39550

See merge request gitlab-org/gitlab-ce!16592

Using correct column for sorting users by Recent Sign-in

Closes #26468

See merge request gitlab-org/gitlab-ce!13852

This reverts commit 3603e7c3a2cfd88e8441c5d76303645776349117.